13. Case 12: Obstacles Avoidance Car#

13.1. Introduction#


This is an obstacle avoidance car. It detects whether there are obstacles in front of it through the ultrasonic sensor on the front of the car, the car automatically turns when it detects obstacles to avoid collisions.

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13.2. Quick Start#


Materials Required#

Nezha expansion board × 1

micro:bit × 1

Sonar:bit × 1

Motors × 2

RJ11 wires × 1

Connection Diagram#

Connect the sonar:bit to J1, the two motors to M1&M4 on the Nezha expansion board as the picture shows.

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Assembly Video#

Video reference: https://youtu.be/k8eaTQSVsfk

Assembly Steps#

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13.3. MakeCode Programming#


Step 1#

Click “Advanced” in the MakeCode to see more choices.

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For programming, we need to add a package: click “Extensions” at the bottom of the MakeCode drawer and search with “PlanetX” in the dialogue box to download it.

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For programming, we need to add a package: click “Extensions” at the bottom of the MakeCode drawer and search with “nezha” in the dialogue box to download it.

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Notice: If you met a tip indicating that some codebases would be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.

Step 2#

Code as below:#

../../_images/case_12_15.png

Reference#

Link:https://makecode.microbit.org/_MyUJpP6L9YPo

You may also download it directly below:

Result#

The car drives and avoids the obstacles automatically.

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